Henry a



(No Model.)

H. A. MATTHEWS.

. KNOB.

No. 449,908. Patented Apr. 7, 1891.

UNITED STATES i ATENT rmcn.

HENRY A. MAITHE\VS, OF VATERBURY, CONNECTICUT.

KNOB.

SPECIFICATION forming part of Letters Patent No. 449,908, dated April '7, 1891. Application filed September 15, 1890. Serial No. 365,000. (No model.)

To all whom it may concern:

Be it known that I, HENRY A. MATTHEWS, of Vaterbury, in the county of New Haven and State of Connecticut, have invented new Improvements in Knobs; and I do hereby declare the following, when taken in connection with accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represent, in-

Figure 1, a side view of the knob complete; Fig. 2, a longitudinal central section of the same; Fig. 3, a transverse section on line a: x of Fig. 2; Fig. 4, a modification inthe attachment of the disk.

This invention relates to an improvement in the construction of knobs such as made from a sheet-metal body and adapted for use upon stoves and for like purposes, the object of the invention being a simple construction whereby a firm attachment of the knob may be produced; and the invention consists in the construction as hereinafter described, and particularly recited in the claim.

The knob is made from sheet metal and consists of two parts, the bodyAand the head B, these two parts being struck to shape in suitable dies and the one closed upon the other at their meeting edges, as at 0. Before closing the parts together a metal disk D is introduced and the parts closed upon the disk so as to hold it firmly in place. To the disk a spindle E is attached by one end, the other end projecting through the open end of the body. At the open end of the body a cupshaped neck. F is introduced, the open end inward, and the edge of the open end expanded within the body so as to be retained in position in thebody. The neck F is of cylindrical shape, corresponding to the opening through the body and so that the neck may slide back and forth or longitudinallyin the body, as indicated in broken lines, Fig. 2. The closed end of the neck is pierced for the passage of the spindle E, the neck being of larger internal diameter than the spindle. The neck is introduced before the part-s A B are closed together. Around the spindle a spring G is arranged, one end bearing against the outerend of the neck and the other against the stationary disk D, so that the tendency of the 'sprin g is to force the neck outward and into the posithe door, or whatever it may be to which the knob is to be attached.

' In the construction of the knob the arrangement of the neck and spring is such that the outer end of the neck will come against the surface to which the knob is to be attached and so that the neck will be forced inward, compressing the spring to some extent before the spindle is brought to its position in such attachment and so that the force of the spring will tend to clamp the thing to which the knob is attached between the inner end of the neck and the fastening device of the spindle upon the reverse side, and thus hold the knob firm and steady in its place without the necessity of a close fit-of the spindle in thehole through which it passes.

In some cases it is desirable to prevent the rotation of the spindle, as when the spindle is screw-threaded and a nut applied upon the inside. To do this the disk D is interlocked with the body. This may be done in various Ways, the single illustration seen in Fig. etbeing sufficient. In this illustration the disk is represented as constructed with notches I, and tongues J are turned therein from the body. This interlocking will hold the disk against rotation independent of the knob itself, and the spindle being firmly attached to the disk will be accordingly prevented from rotation. If desirable, the disk maybe made an integral part of the spindle. Under this construction not only is the knob held firmly in place when attached, but all the parts composing the knob are substantiallyinseparable, a desirable feature in this class of knobs.

lVhile I prefer to make the part D in the form of a complete disk, it is not necessarily made a complete disk, and. portions may be omitted, as indicated in broken lines, Fig. 4;

but in either case it is substantially a dislglielcl firmly within the body.

I clain1- 'lhe herein-described knob, consisting of 5 the body A, having an open inner end, the head B, the body and head closed together, combined with a disk D, secured within the knob, a cup-shaped neck F within the open end of the body and so as to move longitudinally 10 therein, and the spindle E, attached to said disk and extending through the outer end of the said neck with the spring G between the said ncckand disk, substantially as described.

In testimony whereof I have signed this specification in the presence of two subscrib- I5 ing; witnesses.

HENRY A. MATTHEWS.

- \Vitnesses:

G. E. MATTHIEs, GEO. H. SHELTON. 

